more work on authorization handler

receiver/CMakeLists.txt

receiver/src/receiver_config.cpp

receiver/src/receiver_config.h

receiver/src/receiver_error.h

receiver/src/request.cpp

receiver/src/request.h

receiver/src/request_handler_authorize.cpp

receiver/src/request_handler_authorize.h

receiver/src/request_handler_db_write.cpp

receiver/src/request_handler_db_write.h

receiver/src/request_handler_file_write.cpp

receiver/src/requests_dispatcher.cpp

receiver/unittests/mock_receiver_config.cpp

receiver/unittests/test_config.cpp

receiver/unittests/test_connection.cpp

receiver/unittests/test_request.cpp

receiver/unittests/test_request_factory.cpp

receiver/unittests/test_request_handler_db_writer.cpp

receiver/unittests/test_request_handler_file_write.cpp

receiver/unittests/test_requests_dispatcher.cpp